-------------------------------------------------
-- Jira Widget for Awesome Window Manager
-- Shows the number of currently assigned issues
-- More details could be found here:
-- https://github.com/streetturtle/awesome-wm-widgets/tree/master/jira-widget

-- @author Pavel Makhov
-- @copyright 2019 Pavel Makhov
-------------------------------------------------

local awful = require("awful")
local wibox = require("wibox")
local watch = require("awful.widget.watch")
local json = require("json")
local spawn = require("awful.spawn")
local naughty = require("naughty")
local gears = require("gears")
local beautiful = require("beautiful")
local gfs = require("gears.filesystem")
local gs = require("gears.string")
local color = require("gears.color")

local HOME_DIR = os.getenv("HOME")

local GET_ISSUES_CMD = [[bash -c "curl -s --show-error -X GET -n '%s/rest/api/2/search?%s&fields=id,assignee,summary,status'"]]
local DOWNLOAD_AVATAR_CMD = [[bash -c "curl -n --create-dirs -o  %s/.cache/awmw/jira-widget/avatars/%s %s"]]

local function show_warning(message)
    naughty.notify{
        preset = naughty.config.presets.critical,
        title = 'Jira Widget',
        text = message}
end

local jira_widget = wibox.widget {
    {
        {
            {
                id = 'c',
                widget = wibox.widget.imagebox
            },
            {
                id = 'd',
                draw = function(self, context, cr, width, height)
                    cr:set_source(color(beautiful.fg_urgent))
                    cr:arc(height/4, height/4, height/4, 0, math.pi*2)
                    cr:fill()
                end,
                visible = false,
                layout = wibox.widget.base.make_widget,
            },
            id = 'b',
            layout = wibox.layout.stack
        },
        id = 'a',
        margins = 4,
        layout = wibox.container.margin
    },
    {
        id = "txt",
        widget = wibox.widget.textbox
    },
    layout = wibox.layout.fixed.horizontal,
    set_text = function(self, new_value)
        self.txt.text = new_value
    end,
    set_icon = function(self, path)
        self.a.b.c.image = path
    end,
    is_everything_ok = function(self, is_ok)
        if is_ok then
            self.a.b.d:set_visible(false)
            self.a.b.c:set_opacity(1)
            self.a.b.c:emit_signal('widget:redraw_needed')
        else
            self.txt:set_text('')
            self.a.b.d:set_visible(true)
            self.a.b.c:set_opacity(0.2)
            self.a.b.c:emit_signal('widget:redraw_needed')
        end
    end
}

local popup = awful.popup{
    ontop = true,
    visible = false,
    shape = gears.shape.rounded_rect,
    border_width = 1,
    border_color = beautiful.bg_focus,
    maximum_width = 400,
    offset = { y = 5 },
    widget = {}
}


local number_of_issues

local warning_shown = false
local tooltip = awful.tooltip {
    mode = 'outside',
    preferred_positions = {'bottom'},
 }

local function worker(args)

    local args = args or {}

    local icon = args.icon or HOME_DIR .. '/.config/awesome/awesome-wm-widgets/jira-widget/jira-mark-gradient-blue.svg'
    local host = args.host or show_warning('Jira host is unknown')
    local query = args.query or 'jql=assignee=currentuser() AND resolution=Unresolved'

    jira_widget:set_icon(icon)

    local update_widget = function(widget, stdout, stderr, _, _)
        if stderr ~= '' then
            if not warning_shown then
                show_warning(stderr)
                warning_shown = true
                widget:is_everything_ok(false)
                tooltip:add_to_object(jira_widget)

                widget:connect_signal('mouse::enter', function()
                    tooltip.text = stderr
                end)
            end
            return
        end

        warning_shown = false
        tooltip:remove_from_object(jira_widget)
        widget:is_everything_ok(true)

        local result = json.decode(stdout)

        number_of_issues = rawlen(result.issues)

        if number_of_issues == 0 then
            widget:set_visible(false)
            return
        end

        widget:set_visible(true)
        widget:set_text(number_of_issues)

        local rows = {
            { widget = wibox.widget.textbox },
            layout = wibox.layout.fixed.vertical,
        }

        for i = 0, #rows do rows[i]=nil end
        for _, issue in ipairs(result.issues) do
            local path_to_avatar = os.getenv("HOME") ..'/.cache/awmw/jira-widget/avatars/' .. issue.fields.assignee.accountId

            if not gfs.file_readable(path_to_avatar) then
                spawn.easy_async(string.format(
                        DOWNLOAD_AVATAR_CMD,
                        HOME_DIR,
                        issue.fields.assignee.accountId,
                        issue.fields.assignee.avatarUrls['48x48']))
            end

            local row = wibox.widget {
                {
                    {
                        {
                            {
                                resize = true,
                                image = path_to_avatar,
                                forced_width = 40,
                                forced_height = 40,
                                widget = wibox.widget.imagebox
                            },
                            margins = 8,
                            layout = wibox.container.margin
                        },
                        {
                            {
                                markup = '<b>' .. issue.key .. '</b>',
                                align = 'center',
                                forced_width = 350, -- for horizontal alignment
                                widget = wibox.widget.textbox
                            },
                            {
                                text = issue.fields.summary,
                                widget = wibox.widget.textbox
                            },
                            {
                                text = issue.fields.status.name,
                                widget = wibox.widget.textbox
                            },
                            layout = wibox.layout.align.vertical
                        },
                        spacing = 8,
                        layout = wibox.layout.fixed.horizontal
                    },
                    margins = 8,
                    layout = wibox.container.margin
                },
                bg = beautiful.bg_normal,
                widget = wibox.container.background
            }

            row:connect_signal("mouse::enter", function(c) c:set_bg(beautiful.bg_focus) end)
            row:connect_signal("mouse::leave", function(c) c:set_bg(beautiful.bg_normal) end)

            row:buttons(
                    awful.util.table.join(
                            awful.button({}, 1, function()
                                spawn.with_shell("xdg-open " .. host .. '/browse/' .. issue.key)
                                popup.visible = false
                            end)
                    )
            )

            table.insert(rows, row)
        end

        popup:setup(rows)
    end

    jira_widget:buttons(
            awful.util.table.join(
                    awful.button({}, 1, function()
                        if popup.visible then
                            popup.visible = not popup.visible
                        else
                            popup:move_next_to(mouse.current_widget_geometry)
                        end
                    end)
            )
    )
    watch(string.format(GET_ISSUES_CMD, host, query:gsub(' ', '+')),
            10, update_widget, jira_widget)
    return jira_widget
end

return setmetatable(jira_widget, { __call = function(_, ...) return worker(...) end })